[Icom] Problem with ICOM HM-56 hand mic

Fri, 13 Sep 2002 16:23:10 +1200

Hi Ken,

I have looked at the reference list, and HM-56 is not listed
as being compatible with my IC-275H or IC-910H.
However, it works, as far as PTT, UP/DOWN, audio level
is concerned, indistinguishable from the factory supplied
HM-12. DTMF works correctly on both radios.
I conclude, that the compatibility list is only what Icom
will guarantee.
My HM-56 does have battery to hold the DTMF memories.
A wiring or circuit fault _could_ make it activate PTT line.

73 Jens    ZL2TJT

Ken wrote:

> Hi, a couple of thoughts; is the mic compatible with your ICOM radio?
> Check www.icomamerica/ click on "support" then click on "documents" and
> finally "Microphone reference list" to see what radios this mic works
> with. If it's compatible then I would check for a cable/wiring short or
> shorted PTT switch, good luck, Ken
>
> --- [email protected] wrote:
> > Someone once told me that the HM-56 Icom mic had a small battery inside.
> > They
> > said a dead bat in this mic cud cause the associated ICOM
> >
> >  radio to Xmit as soon as the mic was connected, IE before the mic's PTT
> >
> > switch is depressed. I looked inside the mic and cud not find a battery.
> > Any
> > thoughts ?
> >
> > thanks and 73
> >
> > Al
> > W4ABW
> >
> >
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